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Aperiodic Indices · Depth

How much is quoted at the best bid and ask?

The Aperiodic Depth Index is the dollar value quoted at the best bid and ask, for crypto and RWA perps.
Get it through the APIAll indices

Shown: the median perpetual’s book depth across the top 25 levels, as a share of its 20:00–20:45 average, per venue, 18:00–01:00 UTC on 10 Oct 2025; minutes under half of normal take the strong tone, and the lowest of all, OKX’s 8.5% at 22:06, is orange · built with l2_liquidity 1m

Aperiodic Depth Index

Binance’s BTC-USDT perp, then the busiest perps in crypto, US stocks and commodities.
Aperiodic Depth IndexBitcoin USDT perpetual on Binance
$1.1M

Crypto

ContractDepth
Bitcoin
USDT perp · Binance
$1.1M
Ether
USDT perp · Binance
$551.4K
Ether
USDT perp · OKX
$735.5K
Bitcoin
USDT perp · OKX
$1.4M
Bitcoin
USDC perp · Hyperliquid
$1.2M
Bitcoin
USDC perp · Binance
$131.8K

US stocks

ContractDepth
SanDisk
USDT perp · Binance
$11.3K
SanDisk
USDT perp · OKX
$78.7K
Micron
USDT perp · Binance
$4.7K
Alphabet
USDT perp · Binance
$15.1K
Intel
USDT perp · Binance
$17.8K
S&P 500
USDC perp · Hyperliquid
$93.4K

Commodities

ContractDepth
Gold
USDT perp · Binance
$375.6K
WTI crude oil
USDT perp · Binance
$169.7K
Brent crude oil
USDT perp · Binance
$98.9K
Silver
USDT perp · Binance
$423.5K
WTI crude oil
USDC perp · Hyperliquid
$145.4K
Gold
USDT perp · OKX
$365.0K

Get the Aperiodic Depth Index

In the APIl1_liquidity.total_dollar_depth

For every perp we cover, at intervals from 1 minute to 1 day.

In Prime and up, from $399/month billed yearly.

Get it with PrimeSee the dataset

The example needs no key and returns the free sample: BTC-USDT on Binance, 5m bars, May 2025.

Or have your agent pull the last 30 days. Start in Claude · Claude Code · Codex · See the prompt

# Install the Aperiodic CLI into ~/.local/bin
mkdir -p "$HOME/.local/bin"
curl -fsSL https://raw.githubusercontent.com/aperiodic-io/cli/main/install.sh | INSTALL_DIR="$HOME/.local/bin" bash
export PATH="$HOME/.local/bin:$PATH"

# Free preview — no API key required
aperiodic l1_liquidity --preview \
  --exchange binance-futures \
  --symbol perpetual-BTC-USDT:USDT \
  --interval 5m \
  --timestamp exchange \
  --start-date 2025-05-01 \
  --end-date 2025-05-31 \
  --output-dir ./data && echo "Saved to $PWD/data"

Best and worst contracts

The 379 contracts with at least $10M of 24-hour volume, ranked by depth.

Most depth

ContractVenueDepth24h volume
Bitcoin USDTOKX$1.4M$7.65B
Bitcoin USDCHyperliquid$1.2M$3.93B
Bitcoin USDTBinance$1.1M$13.58B
Ether USDTOKX$735.5K$7.97B
Ether USDCHyperliquid$690.7K$1.43B
Ether USDTBinance$551.4K$9.89B
Silver USDTBinance$423.5K$905.5M
Gold USDTBinance$375.6K$2.90B
Gold USDTOKX$365.0K$468.2M
KORU USDTBinance$250.6K$1.20B

Least depth

ContractVenueDepth24h volume
LSK USDTBinance$146$70.9M
MAGMA USDTBinance$153$34.3M
ESPORTS USDTBinance$167$34.4M
BTW USDTOKX$170$10.8M
INIT USDTBinance$173$27.3M
IDOL USDTBinance$178$74.6M
ARIA USDTBinance$179$43.5M
HUMA USDTBinance$192$48.6M
SXT USDTBinance$251$18.8M
EVAA USDTBinance$253$51.9M

Method

  1. Dollars quoted at the best bid plus the best ask (l1_liquidity.total_dollar_depth).
  2. A contract’s value is the mean of its last 24 hours of 5-minute rows. The chart plots those rows.
  3. The API serves the same column at every interval the dataset has.

Columns it reads

  • total_dollar_depthL1 Liquidity

The other indices

Aperiodic Cost IndexWhat does crossing the spread cost?Aperiodic Impact IndexHow far does $1M of net taker flow move the price?

As of 12:20 UTC, 15 minutes behind. Each value is one contract’s last 24 hours of 5-minute rows. The charts plot those rows.

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Built from hundreds of terabytes of raw data and distilled into point-in-time metrics you can pull as parquet files. Plus the raw trades, quotes and derivatives data behind them.

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Shown: minute closes of 847 perpetuals, 20:30–22:30 UTC on 10 Oct 2025, IOTX in orange · built with ohlcv 1m